As a new COVID-19 variant takes over in the U.S., guidance surrounding vaccines has become increasingly confusing. Changes in ...

An expert group charged by the World Health Organization to investigate how the COVID-19 pandemic started released its final ...

A new COVID-19 variant named "Nimbus" has been detected in the U.S. and is spreading rapidly. Here's what to know about ...

A new Covid-19 variant called NB.1.8.1, or Nimbus, represents about a third of new US Covid-19 cases. Dr. Leana Wen answers ...

The FDA has updated labels on the top two COVID-19 vaccines to warn of a rare heart side effect, mostly seen in young men.

A federal grand jury earlier this month charged, with mail fraud, conspiracy to commit mail fraud and conspiracy to submit ...

The World Health Organization’s expert group says the origin of COVID-19 remains inconclusive, though most evidence still ...

Scientists have uncovered a stealthy tactic used by the SARS-CoV-2 virus: one of its proteins can leap from infected cells to ...

Alberta's decision to reduce access to publicly funded COVID-19 vaccines so far appears to set the province on a different course than many other Canadian jurisdictions. Most Albertans will no longer ...

The World Health Organization said on Friday that efforts to determine the origins of SARS-CoV-2, the virus that caused the ...

A video falsely portraying Professor Salim Abdool Karim criticising Covid-19 vaccines has been denounced as disinformation. The Centre for the AIDS Programme of Research in South Africa and the ...

Prevalence rates of frequent dream recall and nightmares varied by country, with frequent nightmares higher in Germany, Finland, and Norway.